Micrometer-gage.



s. PLANT. l MIGROMETBR' GAGE.

'APPLICATION FILED PEB. 24, 1911.

` Patented sept. 9,1913.,

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' er fre 'nanny' s. PLANT. 'or MELROSE, amssACHsE- T'rsMICRClVlETER-GAGE v Lopez/mea;

Speeeatien of Letters Patent.

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Application tiled February 24. $91k Serial No. '616,563.

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lle it. known that l. lli-Navel Prim" a-` vcitizen.ofthe nited States,and 'a residentot' l\ilel rose`A in the county ofltliddlesex and Stateot lllassaehnset'ts, have invented an 1 improve-nient. 1n

M ieronieter Gages, ol whieh the following description` in eonneetionwith the. aeeonilmnying drawiugs" isa speeileation. like elia raeters onAthe drawings representing;` like parts.. v

This inventionrelates to niieroineter gages more particularly adaptedfor interior 1neasnrelnents.. and 5 while thel features thereof .aresusceptible ot general amilieat-ion theyare' more partienlarly relatedtothe gage diselosed ininy Patent No'. $l3-l',t3tl2 dated September 21,'1909.' A f ln .order that theprineiple. ol the inyen* `tion may-bereadily understood, I have dishandle. ot' the `nage: Figs.' lloSinelnsive are.-

side elevations ot parts ofy the gage; Fig. 9'

\ isa sectional detail on an enlarged scale of afportion -o the gage;Fig; l0 is a detail rep-l resenting one manner of formingl the spindle.

The parts herein represented are snbstanlA tially doable the size thatyin practice i have foundto be eonvenient but. it is to be. nnder- Stoodthat they may be ot any desired size and propintion. l

Referring` moreparticularly to that en hodiinent et' my inventionselected for illustration7 the distance pin is indicated at L it. beingTcontained in and-adapted 'to be 'sint ably,v projeetedfroni a. reeeiverQ preferably of `general eylindri al forni and having 'it'. desired uponits lower and preferably split, lend a eap 3 eapable of, suitableadjustment to eoinpensate for wear. Preferably said Cap is threaded ontothe receiver. The pin l may be projected from the receiver n1 anysuitable manner, as. for example. by means et a nutf 4- niounted uponthe threaded portionoi' the pin l; as tally disclosed in niy saidpatent. Any suitable. pin project-ing a means nia-y however, beemployed.' 'I pro- V` .length preferably exeeedingr 'vide the reeeiverL? with asnitable lnanipnlatlngwand .gage balancing handle' tl shown aslal'el'ally projettring therefrom and as ot a that o t-the re-` ceiverl." It -niay be eonneeted in suitable .mannerto'isaid reeeiver` but ishere shown .as interior-lythreaded at T onto a short. bi'ishingS w'hiehitselt'l is threaded, as indieated at. il, into the reeeiver'.' Thehandle (l :is provided with 'siii-table ineans to engage the distaneepin 1 soas not. only to-restrain said pin from rotationwhile it. isbeing' projected by ri'itatilon ot' the nut. 4. but Vso as to loek thesaid pin when projeeted 'to theproper extent` For thatrpurpose lp'relerabl- \"longle lt\ndn1'a'lly groovethe-pin laas iii'dieated at.

10, said groove being' preferably V2 shaped Fig'. 3f provided to entersaid groove ltl torestfrain the pin 1 'trom rotation or to loek it in adjuste'd positioii'il have herein provided-'a spindle 1l axia-ll)Ypositioned within the handle (li whieh is hererepresented as providedvwith annular' shoulders l?- and lil-to respeetivelyengage Collars orenlargements 114-. .l5 upon tilie spindle ll. The spindle "ll may have ashoulder against whioh the part 15T-@Sts ii" the latter be formed as acollar.

lllhilegany` suitable ineans nlay be The. Spindle' is provided vwith anenlargevnient '1st,' which as `iS-integral with 'the spindle istherefore ot' `eoinpa atively sott- .,inetal. The collar ll eontaetingwithsaid enlargement is. however. of relatively hard metal eonlpz'iredwith ,the spindle and the en- That' largement ll. as is also the handle6.' edge ot the Collar 14twlneh the-more relnote troni tbeenlarnenient-v 14 is slightly enrved as indieatedat` 14",i11l4`igz' 9,and the eorresimnchngr shoulder l2 within the handle (l ist'ornied Upon-abevel' as indieated mostelearlv in 'Figa' 9, Yherefore, the Contactbe@- tween the shoulder 1Q andadjacent face of the collar ll is limitedto a relatively narrow band or line. Owiiin to -the'deserihed e011-strinftimL-the inaniitnilation of the handle G to lock the pin 1 inadjusted position does not forma bur upon the dollar 14, as would beth'ease it' hard and sott in et'alparts here eentacted. i At its enter endthe handle 6 is provided with. a Cap i6 threaded thereint-o, the capbejin-g;V represented as soeketed .to receive the lOE outer end of thespindle 11. The inner end of the spindle is privided with a preferablyedge shaped inner end 17 to enter the shoulder 13 in the handle by meansof a Y 'coiled spring 19 suitably lensioned between the collar 15 andcap 115 as illustrated.

ln assembling the parts, the bushing 8 is slipped onto the outer-end ofthe spindle 11 which in practice is made in tivo parts threaded togetherasl by the internally threaded Aenlargeinent 14. Fig 1() to receivethehexternailv threaded end of the'other part. yEhe bushing 8 is slidforward to the pointed or Wedge shaped end 17. Thereafter the collar 1-1is positioned on the spindle. rthe spindle may then be inserted into thehandle G, which is threaded onto the bushing S as described; .afterwhich the collar 15 and spring l. are placed onto the spindle and thecap 16 is then screwed into position.

.'-Xssumingthe distance pin 'l to have been projected .to the desiredextent. the handle 6 is turned in a clockjvise direction until theshoulder 12 upon the handle is brought into engagement With the collar14 upon the spindle 11, thereby positively projecting or holding thepointl of the spindle tightly in the groove 10. so that the distance pinl is set or locked in position. If now the handle G be turned slightlyin the opposite direction.-that` is contraclockvvise-then the handle 6is moved outward slightly from the receiver 2 and the shoulder 12 isWithdrawn slightly from the collar 14, but the spring 19, because it istensioned between the cap -16 and collar 15, forces the spindle 11yieldingly inward so that. its pointed end 17 is yieldinglvmaintains-din the groove 10 of the pin 1. Slight play may exist betweenthe pointed end 17 and the bottom of thev groove 10. Therefore said pin1 is reT strained-from rotation and by rotation of the nut -1 the axialposition of said distance pin 1 may be changed. It Will therefore beapparent .that during the axial positioning of the' pin 1, the said pinis held from rotation by the stress of the spring 19 and that when thepinhas been suitably projected to the desired extent the tightening ofthe handle etfects the instant locking of the pin in its projectedposition. lf now the handle 6 be still further rotated in a contraclock-Wise direction, it is evident that the shoulder 13 brings up against thecollar 15 and that f therefore the tension of the spring 1)- no longeris borne by the spindle 11 but by the handle 6. Therefore the distancepin 1 may be readily removed for the substitution of a pin of diiferentlength yWithout undue friction of the point 17 in the groove 10..

Having thus described one illustratire embodiment of myinvention, Idesire it to .spindle and handlev to hold the be understood that.although specificterms are employed, they are used in a' generic anddescriptive sense and ,not for purposes oflimitation, the scope of theinvention being set forth in the following claims.l

Claims. i

1. A micrometer gage having a ,distance pin, a receiver therefor fromWhich said pin may be projected, a' laterally extending l' handle, means\\'li`ereby the same is adjustably mounted on said receiver, a spindleWithin the handle, and a spring to project saidspindle into engagementwith thev said pin, said handle lia-vii'ig a`spring-compress-- ingshoulder and coperating spring pressing linea-ns io'engage and controlthe tension of the spring, ivhereby the spring projection of the spindleis controlled by the. adjustment of the handle. v y

2. A micrometer' gage having a distance said pin may be projected, ahandle having pin. a receiver therefor-and from which spring actuatedmeans `to eig'age the pin l said spindle `and said vhandle beingrespectively provided With coperatingprojections- 'normally separatedwhen the pin is projected and Whioh may be brought into engagement byhandle adjustment. thereby to hold the spindle in non-locking position.,

4. A micrometer gage having a distance pin', areceiver therefor and fromwhich said'` pin may be projected, a laterally projecting handle, havingmeans for adjustably attachingit to said receiveiga spindle Within saidhandle thereof, interengaging projections upon the spindle and handlerespectively, 'to

lock the spindlein engagementwith the pin,

and interengaging projections upon the spindle in non-locking position.

5. A micrometer gage having a distance pin, a receiver therefor andfroml which said pin may be projected, a handle laterally projectingfrom the receiver, means for effecting longitudinal adjustment of saidhandle, an axial spindle carried by the handle, a spring to press saidspindle into engagement with said pin and interengaging lockingformations upon the spindle and handle, whereby rotation of said handleeffects locking of the pin by the spindle and opposite rotation of thehandle effects its release.

6. A micrometer gage having a distance pin, a receiver therefor and fromwhich s ald pin may be projected. a laterally extending fixed bushing, ahandle adjustably mounted tionof the spindle thereon, a spindle thereinhaving an en-' largement which is engaged by said handle,

and a spring to project said spindle.

LA micrometer gage having a distance pin, a receiver therefor and fromwhich said pin may be projected, a laterally extending -fixed bushing, ahandle adjustably mounted thereon, a spindle carried by -said bushing,

` and a spring to project said spindle. into engagement with the Ein,said spring projeceing controlled by adjustment of the handle.

8. A micrometer gage having a distance' pin, a receiver therefor tromwhich said pin may be -pro]ected, a laterally extendingV bushingthreaded into said receiver, a han- .dle threaded onto andadjustable'Wit-h respect to said bushing, a spring presse'dspin-v dlemounted Within .said handle and having an end extending through saidbushing to vcontact with said distance pin, the distance pin beingrestrained from rotation or locked in adjusted position by manipulationof the handle. v

9; A micrometer gage having a distance pin, a receiver therefor fromwhine nifl pin may be projected, a hollow handle 6 extending from andhaving means for adjustably uniting it to said receiver, said handlehaving an internal shoulder 13,a spindle' 11 mounted Within said handleand having enlargements 14 and 15, and a spiral spring 19 vsurroundingsaid spindle and engaging the enlargement 15 and the handle end. y

NA10. A micrometer gage having a distance pm, a receiver therefor fromWhich said pin may be projected, a vhandle 6 laterally extended fromsaid receiver and having means HENRY S. PLANT.

yWitnesses IRVING U. TOWNseNn, ROBERT H. KAMMLER.

